The effects of voluntary movements on auditory-haptic and haptic-haptic temporal order judgments
The effects of voluntary movements on auditory-haptic and haptic-haptic temporal order judgments
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DOI：
10.1016/j.actpsy.2012.07.010
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发表时间：
2012-10-01
影响因子：
1.8
通讯作者：
Guastavino, Catherine
中科院分区：
文献类型：
--
作者：
Frissen, Ilja;Ziat, Mounia;Guastavino, Catherine
在两个实验中，我们调查的影响，自愿运动的时间触觉感知。测量的灵敏度（JND）和时间对齐（PSS）的时间顺序的判断，获得了三个运动条件下的通道间的触觉（实验1）或通道内的触觉（实验2）刺激对。在基线，静态条件下，参与者的手臂保持静止。在被动条件下，手臂由伺服控制的电动装置移位。在主动条件下，参与者自愿移动。听觉刺激是通过耳机呈现的短的500 Hz音调，触觉刺激是与手指运动正交地施加到食指尖端的短暂阈上力脉冲。主动运动并没有显着影响歧视的触觉刺激对的灵敏度，而它显着提高灵敏度的触觉刺激对的情况下，表现出在触觉系统中的时间灵敏度的电机命令信息的关键作用。主观性的点大体上与物理性一致，只有一个明显的例外，即在被动条件下的触觉刺激对。在后一种情况下，触觉刺激必须在听觉刺激之前45 ms呈现，以获得主观的一致性。提出了一个模型来解释的歧视性能。(C)2012爱思唯尔有限公司版权所有。
In two experiments we investigated the effects of voluntary movements on temporal haptic perception. Measures of sensitivity (JND) and temporal alignment (PSS) were obtained from temporal order judgments made on intermodal auditory-haptic (Experiment 1) or intramodal haptic (Experiment 2) stimulus pairs under three movement conditions. In the baseline, static condition, the arm of the participants remained stationary. In the passive condition, the arm was displaced by a servo-controlled motorized device. In the active condition, the participants moved voluntarily. The auditory stimulus was a short, 500 Hz tone presented over headphones and the haptic stimulus was a brief suprathreshold force pulse applied to the tip of the index finger orthogonally to the finger movement. Active movement did not significantly affect discrimination sensitivity on the auditory-haptic stimulus pairs, whereas it significantly improved sensitivity in the case of the haptic stimulus pair, demonstrating a key role for motor command information in temporal sensitivity in the haptic system. Points of subjective simultaneity were by-and-large coincident with physical simultaneity, with one striking exception in the passive condition with the auditory-haptic stimulus pair. In the latter case, the haptic stimulus had to be presented 45 ms before the auditory stimulus in order to obtain subjective simultaneity. A model is proposed to explain the discrimination performance. (C) 2012 Elsevier B.V. All rights reserved.